The following links are the most(as of Jan 2007) impressive "free"(Yes, Free and no link back required from them or no catch) stock images that can be used for your medical Powerpoint presentations or medical, health related websites. Each image is presented here by keeping the designers in mind. Check these images and give your feedback through comments.

http://www.sxc.hu/photo/124837

http://www.sxc.hu/photo/108602

http://www.sxc.hu/photo/230992

http://www.sxc.hu/photo/220623

http://www.sxc.hu/photo/72200

http://www.sxc.hu/photo/230991

http://www.sxc.hu/photo/72201

http://www.sxc.hu/photo/33787

http://www.sxc.hu/photo/648495

http://www.sxc.hu/photo/72212

http://www.sxc.hu/photo/648494

http://www.sxc.hu/photo/600974

http://www.sxc.hu/photo/124817

http://www.sxc.hu/photo/446622

http://www.sxc.hu/photo/124838

http://www.sxc.hu/photo/387209

http://www.sxc.hu/photo/480932